All names: WD 0813+448, SDSS J081646.91+444228.9, SDSS J081646.92+444228.9, Gaia EDR3 928622786103781888, SDSS J081646.91+444229.0, Gaia DR2 928622786103781888, Gaia DR3 928622786103781888, GALEX J081646.9+444229
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Gaia DR2 | Stilism | Simbad | Eisenstein et al. 2006 | White Dwarf Catalog (McCook & Sion 1999) | Kleinman et al. 2013 | Kleinman et al. 2004 | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 08 16 46.88 (0.6) | 08 16 46.91 | 08 16 46.89 (0.9) | 08 16 46.91 (0.6) | 08 16 46.91 | 08 16 45.86 | 08 16 46.92 | 08 16 46.92 | ||||
| Declination | 44 42 28.93 (0.5) | 44 42 28.97 | 44 42 28.93 (0.7) | 44 42 28.94 (0.5) | 44 42 29.05 | 44 42 25.20 | 44 42 28.93 | 44 42 28.94 | ||||
| Spectral type | DA | DA | DA3.9 | DA | DA | |||||||
| Effective temperature | [K] | 13115.0 (539) | 13146.0 (696) | 13027.0 (545) | ||||||||
| log(g) | [cgs] | 8.04 (0.2) | 8.11 (0.2) | 8.09 (0.2) | ||||||||
| Mass | [M☉] | 0.669 (0.1) | ||||||||||
| log(Luminosity) | [L☉] | |||||||||||
| Cooling age | [Gyr] | |||||||||||
| log(H/He) | ||||||||||||
| log(C/He) | ||||||||||||
| log(Ca/He) | ||||||||||||
| log(Ca/H) | ||||||||||||
| Parallax | [mas] | 0.41 (0.9) | 0.04 (1) | 0.41 (0.9) | ||||||||
| Distance | [pc] | 2453.15 (5291) | 22337.61 (565140) | 2453.39 (5292) | ||||||||
| Composition | ||||||||||||
| Proper motion (right ascension) | [mas/yr] | -17.77115015 (0.8) | -19.29115962 (2) | -17.771 (0.8) | -0.8 | 0.0 | ||||||
| Proper motion (declination) | [mas/yr] | -0.23284535 (0.6) | 0.013206123 (1) | -0.233 (0.6) | -3.7 | 0.0 | ||||||
| Variability | ||||||||||||
| Magnetic | ||||||||||||
| Bd | [MG] | |||||||||||
| Infrared excess (disk) | ||||||||||||
| Binarity | ||||||||||||
| B magnitude | ||||||||||||
| V magnitude | ||||||||||||
| R magnitude | ||||||||||||
| I magnitude | ||||||||||||
| J magnitude | ||||||||||||
| H magnitude | ||||||||||||
| K magnitude | ||||||||||||
| u magnitude | 20.67 (0.06) | 20.67 (0.07) | 20.67 (0.06) | 20.67 | 20.66 (0.06) | 20.67 (0.07) | ||||||
| g magnitude | 20.12 (0.02) | 20.16 (0.03) | 20.17 (0.03) | 20.15 | 20.17 (0.03) | 20.15 (0.03) | ||||||
| r magnitude | 20.28 (0.02) | 20.30 (0.03) | 20.31 (0.03) | 20.31 | 20.30 (0.03) | 20.31 (0.03) | ||||||
| i magnitude | 20.50 (0.04) | 20.51 (0.05) | 20.52 (0.05) | 20.53 | 20.52 (0.05) | 20.53 (0.05) | ||||||
| z magnitude | 20.59 (0.2) | 21.21 (0.3) | 21.14 (0.3) | 21.01 | 21.13 (0.3) | 21.01 (0.3) | ||||||
| G magnitude | 20.21 (0.08) | 20.26 | 20.21 (0.008) | |||||||||
| BP magnitude | 20.28 (0.08) | 20.26 | ||||||||||
| RP magnitude | 20.15 (0.3) | 20.10 | ||||||||||
| Pan g magnitude | 20.13 (0.02) | |||||||||||
| Pan r magnitude | 20.28 (0.02) | |||||||||||
| Pan i magnitude | 20.48 (0.03) | |||||||||||
| Pan z magnitude | 20.63 (0.06) | |||||||||||
| Pan y magnitude | ||||||||||||
| E(B-V) | 0.035 | |||||||||||
* Constant surface field
Spectra without link are available upon request
The Montreal White Dwarf Database is produced and maintained by Prof. Patrick Dufour (Université de Montréal) and Dr. Simon Blouin (University of Victoria). Please send database updates, corrections, suggestions or bug reports to patrick.dufour@umontreal.ca.